Adding type inference from schema

[eladhaim]

This library is extremely useful, and we rely on it frequently. However, we believe there’s a feature that could make it even better: type inference at build time, rather than runtime as it currently works. For instance, something similar to the zod library’s infer type feature.

Our idea is for avro.Type.forSchema to return the actual type instead of any, eliminating the need to generate TypeScript types using a separate library. I’d be happy to open a pull request and work on this. Would this be something you’d consider accepting?